Fellaini scored two times for United within the Four-Zero win over the lacklustre Eagles.
Goals from Juan Mata and Romelu Lukaku added to to romp at Old Trafford.
Fellaini was once one in all 5 avid gamers to return into the beginning XI after being benched for the midweek shuttle to CSKA Moscow.
And Mourinho admitted United’s key playmaker Mkhitaryan was once no longer at his best possible lately.
“I had issues (in regards to the avid gamers’ health),” mentioned Mourinho.
“Palace had one week to arrange. They misplaced avid gamers throughout the week.
“We needed to play in Russia. I needed to make adjustments. The mentality allowed me to do this. Everybody desires to play.
“I may just see the difference between Mkhitaryan and Fellaini. Mkhitaryan performed and Fellaini did not in Russia
“The momentum is good and the players are happy and confident.”
United transfer best of the desk courtesy of the win – however might be leapfrogged if Manchester City beat Chelsea this afternoon.